{"id":"CVE-2026-98846","title":"kernel: sctp: check RCV_SHUTDOWN after the sendmsg connect wait (CVE-2026-98846)","summary":"A flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) subsystem. A race condition can occur when an SCTP socket is shut down concurrently while waiting for a connection, causing an association structure to be f…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-825","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-23","sourceUpdated":"2026-10-23T22:14:26+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98846.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98846.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98846"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555197"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98846"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98846"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98846.mbox"},{"url":"https://git.kernel.org/stable/c/1bef1944ef15a40797305bf916827b04df6307ca"},{"url":"https://git.kernel.org/stable/c/e8f972b1759d26bbefe4c524caae1ed7c8a593bd"},{"url":"https://git.kernel.org/stable/c/e701345d886e831fb593a0870d69c8c5de6fc938"},{"url":"https://git.kernel.org/stable/c/222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669"},{"url":"https://git.kernel.org/stable/c/4f1da630d13de0370e2f6361f961f1c8b384af1c"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00156,"epssPercentile":0.04713,"ingestedAt":"2026-10-18T16:47:32.465Z","slug":"CVE-2026-98846","body":"## Overview\n\nA flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) subsystem. A race condition can occur when an SCTP socket is shut down concurrently while waiting for a connection, causing an association structure to be freed while still in use. A local user could exploit this flaw to trigger a use-after-free condition, resulting in a Denial of Service (DoS) via a system crash or potential privilege escalation.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98846.json)\n\n**kernel: sctp: check RCV_SHUTDOWN after the sendmsg connect wait** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 7\n\n## Remediation\n\nOut of support scope","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228602,"id":"CVE-2026-98846","ts":1792844809964,"field":"cvss","old":null,"new":"5.5"},{"seq":228601,"id":"CVE-2026-98846","ts":1792844809964,"field":"severity","old":"none","new":"medium"}]}